C#實現導出Excel

這段時間用到了導出Excel的功能，這個功能還是比較常用的，我常用的有兩個方法，現在整理一下，方便以后查看。

一、實現DataTable數據導出到本地，需要自己傳進去導出的路徑。

        /// <summary>
        /// DataTable導出到Excel
        /// </summary>
        /// <param name="table">DataTable類型的數據源</param>
        /// <param name="file">需要導出的文件路徑</param>
        public void dataTableToCsv(DataTable table, string file)
        {
            string title = "";
            FileStream fs = new FileStream(file, FileMode.OpenOrCreate);
            StreamWriter sw = new StreamWriter(new BufferedStream(fs), System.Text.Encoding.Default);
            for (int i = 0; i < table.Columns.Count; i++)
            {
                title += table.Columns[i].ColumnName + "\t"; //欄位：自動跳到下一單元格
            }
            title = title.Substring(0, title.Length - 1) + "\n";
            sw.Write(title);
            foreach (DataRow row in table.Rows)
            {
                string line = "";
                for (int i = 0; i < table.Columns.Count; i++)
                {
                    line += row[i].ToString().Trim() + "\t"; //內容：自動跳到下一單元格
                }
                line = line.Substring(0, line.Length - 1) + "\n";
                sw.Write(line);
            }
            sw.Close();
            fs.Close();
        }

二、實現DataTable數據導出到本地，路徑可以由用戶自主選擇。

        /// <summary>
        /// DataTable導出到Excel
        /// </summary>
        /// <param name="dt">DataTable類型的數據源</param>
        /// <param name="FileType">文件類型</param>
        /// <param name="FileName">文件名</param>
        public void CreateExcel(DataTable dt, string FileType, string FileName)
        {
            Response.Clear();
            Response.Charset = "UTF-8";
            Response.Buffer = true;
            Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
            Response.AppendHeader("Content-Disposition", "attachment;filename=\"" + System.Web.HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8) + ".xls\"");
            Response.ContentType = FileType;
            string colHeaders = string.Empty;
            string ls_item = string.Empty;
            DataRow[] myRow = dt.Select();
            int i = 0;
            int cl = dt.Columns.Count;
            for (int j = 0; j < dt.Columns.Count; j++)
            {
                ls_item += dt.Columns[j].ColumnName + "\t"; //欄位：自動跳到下一單元格
            }
            ls_item = ls_item.Substring(0, ls_item.Length - 1) + "\n";
            foreach (DataRow row in myRow)
            {
                for (i = 0; i < cl; i++)
                {
                    if (i == (cl - 1))
                    {
                        ls_item += row[i].ToString() + "\n";
                    }
                    else
                    {
                        ls_item += row[i].ToString() + "\t";
                    }
                }
                Response.Output.Write(ls_item);
                ls_item = string.Empty;
            }
            Response.Output.Flush();
            Response.End();
        }

三、方法的調用。

第一種方法的調用：

 this.dataTableToCsv(dt, @"C:\Users\Admin\Desktop\收聽率" + DateTime.Now.ToString("yyyy-MM-dd HHmmss") + ".xls"); //調用函數 

 第二種方法的調用：

 CreateExcel(dt, "application/ms-excel", "Excel" + DateTime.Now.ToString("yyyy-MM-dd HHmmss") + ".xls");//調用函數

這兩種方法都是可以直接調用的，只需要傳入需要的參數即可。

如果是通過前台js方式實現，跳轉href為實現數據導出的頁面地址，我是通過前台跳轉到ashx頁面實現的

ashx頁面內容

public void ProcessRequest(HttpContext context)
        {string message = "";
            string Action = context.Request["Action"];
            switch (Action)
            {case "Excel":
                    DataTable Radio = GetExcleData(context); //獲取導出數據源
                    RadioCommon helper = new RadioCommon();
                    helper.ExportExcel(Radio, "application/ms-excel", "Excel" + DateTime.Now.ToString("yyyy-MM-dd HHmmss"));
                    break;
            }
            context.Response.Write(message);
        }

js部分內容

  $("#Excel").bind('click', function () {
                var url = "AjaxHandler/RadioFamilyDayNumber.ashx?Action=Excel";
                window.location.href = url;//導出Excel
            })